An interesting, beautiful but difficult concept design idea, Sense by Patty Yuan, a wrist-based bluetooth device that senses your emotion by reading your heart rate, skin temperature.
Mapping emotion to biometric data is a difficult research question, especially when it supposedly presents itself as a nonverbal communication device. What is communicated here? What is the language? What is the feedback loop? Many devices from this category deal with the same complexity: how to map these data to a visual or haptic language.